U.S. patent number 6,081,647 [Application Number 09/002,996] was granted by the patent office on 2000-06-27 for fiber optic connector receptacle.
This patent grant is currently assigned to Molex Incorporated. Invention is credited to Richard F. Roth, Gregory John Spiewak.
United States Patent |
6,081,647 |
Roth , et al. |
June 27, 2000 |
Fiber optic connector receptacle
Abstract
An receptacle is provided for receiving a fiber optic connector
along an optic axis. The receptacle includes a housing having an
open end for receiving the fiber optic connector. A pair of shutter
members are pivotally mounted on the housing at opposite sides of
the open end of the housing for pivotal movement toward and away
from each other to close and open the open end. The shutter members
extend across the optic axis when the shutter members are closed.
The shutter members are pivotable away from the optic axis upon
engagement by the inserted fiber optic connector. A metal shell
member is disposed about at least a portion of the housing. A latch
is mounted on the housing for latchingly engaging a fiber optic
connector. The shell member includes a spring portion for
spring-loading the latch.
Inventors: |
Roth; Richard F. (Downers
Grove, IL), Spiewak; Gregory John (Coal City, IL) |
Assignee: |
Molex Incorporated (Lisle,
IL)
|
Family
ID: |
21703575 |
Appl.
No.: |
09/002,996 |
Filed: |
January 5, 1998 |
Current U.S.
Class: |
385/139; 385/59;
385/60 |
Current CPC
Class: |
G02B
6/3888 (20210501); G02B 6/3885 (20130101); G02B
6/3887 (20130101); G02B 6/3825 (20130101); G02B
6/389 (20130101); G02B 6/3821 (20130101); G02B
6/3869 (20130101) |
Current International
Class: |
G02B
6/38 (20060101); G02B 006/38 () |
Field of
Search: |
;139/56-60,62,76,78,77,81,139 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Ngo; Hung N.
Attorney, Agent or Firm: Tirva; A. A.
Claims
We claim:
1. A receptacle for receiving a fiber optic connector along an
optic axis, comprising:
a housing having an open end for receiving the fiber optic
connector inserted thereinto on said optic axis by gripping the
connector between an operator's fingers; and
a latch mounted on the housing for latchingly engaging the fiber
optic connector to hold the connector inserted into the open end of
the housing, the latch including an actuating portion located for
engagement by at least one of the operator's fingers while
continuously gripping the connector.
2. The receptacle of claim 1, including spring means operatively
associated with the latch for biasing the latch into latching
engagement with the fiber optic connector.
3. The receptacle of claim 2 wherein said spring means is
operatively associated between the latch and the housing.
4. The receptacle of claim 2, including a metal shell member about
at least a portion of said housing, said spring means being
operatively associated between the latch and the metal shell
member.
5. The receptacle of claim 4 wherein said metal shell member
includes a resilient portion comprising said spring means.
6. The receptacle of claim 5 wherein said resilient portion of the
metal shell member comprises a cantilevered spring arm having a
distal end engageable with the latch.
7. The receptacle of claim 5 wherein said housing is adapted for
mounting in an opening in a panel, circuit board and the like.
8. An adapter assembly for receiving a fiber optic connector
comprising:
an adapter having an open end for receiving the fiber optic
connector;
a latch on the adapter for latchingly engaging the fiber optic
connector; and
a metal shell member about at least a portion of the adapter, the
shell member being independent of the latch and including a first
portion for spring-loading said latch and a second portion
engageable with the adapter.
9. The adapter assembly of claim 8 wherein said metal shell member
is
stamped and formed of sheet metal material, said first portion
comprising a stamped and formed spring arm and said second portion
comprising a stamped and formed retention tab.
10. The adapter assembly of claim 8 wherein said first portion of
the metal shell member comprises a cantilevered spring arm having a
distal end engageable with the latch.
11. An adapter assembly for receiving a fiber optic connector
comprising:
an adapter having an open end for receiving the fiber optic
connector;
a latch on the adapter for latchingly engaging the fiber optic
connector; and
a metal shell member abut at least a portion of the adapter, the
shell member being independent of the latch and including a spring
portion for spring-loading said latch.
12. The adapter assembly of claim 11 wherein said metal shell
member is stamped and formed of sheet metal material, and said
spring portion comprises a cantilevered spring arm having a distal
end engageable with the latch.
Description
FIELD OF THE INVENTION
This invention generally relates to the art of fiber optic
connectors and, particularly, to a receptacle, such as an adapter
assembly, for receiving a fiber optic connector at one or both ends
of the adapter assembly.
BACKGROUND OF THE INVENTION
Fiber optic connectors of a wide variety of designs have been
employed to terminate optical fiber cables and to facilitate
connection of the cables to other cables or other optical fiber
transmission devices. A typical optic fiber connector includes a
ferrule which mounts and centers an optical fiber or fibers within
the connector. The ferrule may be fabricated of such material as
ceramic. A ferrule holder or other housing component of the
connector embraces the ferrule and may be fabricated of such
material as molded plastic. A spring may be disposed within the
housing or ferrule holder such that the ferrule is yieldably biased
forwardly for engaging another fiber-mounting ferrule of a mating
connecting device.
A pair of fiber optic connectors or a connector and another optical
fiber transmission device often are mated in an adapter which
centers the fibers to provide low insertion losses. The adapter
couples the connectors together so that their encapsulated fibers
connect end-to-end. The adapter may be an in-line component, or the
adapter can be designed for mounting in an opening in a panel,
backplane, circuit board or the like.
The present invention is directed to various improvements in such
optical fiber apparatus.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a new and improved
adapter assembly for mating an optical fiber to an associated fiber
optic transmission means along an optic axis.
In the exemplary embodiment of the invention, the assembly includes
an adapter having a first receptacle end and a second receptacle
end. The first receptacle end is adapted for receiving the
associated fiber optic transmission means on the optic axis. At
least a pair of shutter members are pivotally mounted on the
adapter at opposite sides of the first receptacle end. The shutter
members are pivotally movable toward and away from each other to
close and open the first receptacle end. The shutter members extend
across the optic axis to intersect any light beams and to prevent
light energy from exiting the adapter when the shutter members are
closed. The shutter members are pivotable away from the optic axis
upon engagement by the associated fiber optic transmission
means.
Preferably, spring means are operatively associated with the
shutter members for biasing the shutter members toward closed
positions upon removal of the associated fiber optic transmission
means. As disclosed herein, the spring means comprise torsion
springs operatively associated between the shutter members and the
adapter. The first receptacle end is generally rectangular, and a
pair of the shutter members are disclosed of generally rectangular
configurations. A shutter member is pivotally mounted on the
adapter for closing and opening the second receptacle end.
As disclosed herein, the associated fiber optic transmission means
is a fiber optic connector. The fiber optic connector is inserted
into the second receptacle end of the adapter by gripping the
connector between an operator's fingers. A feature of the invention
is the provision of a latch mounted on the housing for latchingly
engaging the fiber optic connector to hold the connector inserted
into the receptacle end of the adapter. The latch includes an
actuating portion located for engagement by at least one of the
operator's fingers while gripping the connector.
Another feature of the invention is the provision of a metal shell
about at least a portion of the adapter. The shell is stamped and
formed of sheet metal material and performs a multiplicity of
functions. First, the shell performs it's shielding function about
the fiber optic connector. Second, the shell has a cantilevered
spring arm engageable with the latch to bias the latch into
engagement with the inserted connector. Third, the shell has a
resilient portion engageable within an opening in the adapter.
Other objects, features and advantages of the invention will be
apparent from the following detailed description taken in
connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
The features of this invention which are believed to be novel are
set forth with particularity in the appended claims. The invention,
together with its objects and the advantages thereof, may be best
understood by reference to the following description taken in
conjunction with the accompanying drawings, in which like reference
numerals identify like elements in the figures and in which:
FIG. 1 is a perspective view of the adapter and the board connector
of the invention;
FIG. 2 is an axial section through the adapter with the board
connector inserted into one end thereof, along with an elevational
depiction of a cable connector inserted into the opposite end of
the adapter;
FIG. 3 is a perspective view of the adapter, with the outer housing
bracket removed;
FIG. 4 is a view similar to that of FIG. 3, with the metal shell of
the adapter removed;
FIG. 5 is a view similar to that of FIG. 2, with the board
connector removed from the adapter;
FIG. 6 is a view similar to that of FIG. 5, with the cable
connector removed;
FIG. 7 is a top plan view of the metal shell of the adapter;
FIG. 8 is a side elevational view of the shell;
FIG. 9 is a broken-away perspective view of the adapter inner
housing, pivoted latch and pivoted shutters;
FIG. 10 is an axial section through the board connector mounted at
an edge of a circuit board;
FIG. 11 is a perspective view of the inner housing insert of the
board connector, with the fiber ferrule projecting therefrom;
FIG. 12 is a side elevational view of the lower half of the inner
housing insert of the board connector;
FIG. 13 is a bottom plan view of the lower half of the housing
insert;
FIG. 14 is an end elevational view of the lower half of the housing
insert;
FIG. 15 is a side elevational view of the upper half of the housing
insert;
FIG. 16 is a top plan view of the upper half of the housing
insert;
FIG. 17 is an end elevational view of the upper half of the housing
insert;
FIG. 18 is a top plan view of the cable connector;
FIG. 19 is a side elevational view the cable insert;
FIG. 20 is a vertical section taken generally along line 20--20 of
FIG. 18;
FIG. 21 is a horizontal section taken generally along line 21--21
of FIG. 19;
FIG. 22 is a top plan view of the cable connector housing;
FIG. 23 is a bottom plan view of the cable connector housing;
FIG. 24 is a side elevational view of the cable connector
housing;
FIG. 25 is a vertical section taken generally along line 25--25 of
FIG. 23;
FIG. 26 is a top plan view of the cable connector rear cover;
FIG. 27 is a side elevational view of the cable connector rear
cover;
FIG. 28 is a vertical section taken generally along line 28--28 of
FIG. 26;
FIG. 29 is a top plan view of the cable connector boot;
FIG. 30 is a side elevational view of the boot;
FIG. 31 is a vertical section taken generally along line 31--31 of
FIG. 29;
FIG. 32 is a horizontal section taken generally along line 32--32
of FIG. 30;
FIG. 33 is a top plan view of the cable connector alignment pin
holder;
FIG. 34 is an end elevational view of the pin holder;
FIG. 35 is a horizontal section taken generally along line 35--35
of FIG. 34;
FIG. 36 is a top plan view of the cable connector pull latch;
FIG. 37 is a side elevational view of the pull latch;
FIG. 38 is a vertical section taken generally along line 38--38 of
FIG. 36; and
FIG. 39 is a horizontal section taken generally along line 39--39
of FIG. 37.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings in greater detail, and first to FIGS. 1
and 2, the invention is embodied in a fiber optic connector/adapter
assembly, generally designated 10, which includes three main
components, namely: an adapter assembly, generally designated 12; a
board connector, generally designated 14; and a cable connector,
generally designated 16. Adapter assembly 12 is designed for
mounting in an opening 18 in a panel, backplane or circuit board
20. Board connector 14 is adapted for mounting near the edge of a
printed circuit board 22. Cable connector 16 is adapted for
terminating a fiber optic cable 24. While board connector 14 is
mounted on circuit board 22, the board connector also could be
provided for terminating a fiber optic cable. However, for clarity
purposes herein, connector 14 will be referred to as the "board"
connector and connector 16 will be referred to as the "cable"
connector.
Adapter assembly 12 includes an inner housing 26 which surrounds
the mating ends of board connector 14 and cable connector 16 and
defines the interface area therebetween. The inner housing has a
first receptacle end 26a for receiving board connector 14 and a
second receptacle end 26b for receiving cable connector 16. A pair
of shutter members or doors 28 close and open first receptacle end
26a, and a single shutter member or door 30 closes and opens second
receptacle end 26b. A latch, generally designated 32 is movably
mounted on inner housing 26 for latching engagement with cable
connector 16. A metal shell, generally designated 34, embraces a
portion of inner housing 26. An outer housing bracket, generally
designated 36, substantially surrounds the adapter assembly and
provides means for mounting the assembly within opening 18 in panel
20.
More particularly, still referring to FIGS. 1 and 2, outer housing
bracket 36 of adapter assembly 12 includes upper and lower flanges
36a for mounting the adapter assembly against a face 38 of panel
20. The flanges may have holes 40 (FIG. 2) aligned with holes 42 in
the panel for receiving appropriate fastening means such as screws,
bolts or the like. On the other hand, outer housing bracket 36 is a
unitary structure molded of dielectric material such as plastic or
the like, and flanges 36a may include integral mounting studs 44
(FIG. 1) for projecting into holes 42 in panel 20.
Referring to FIGS. 3, 7 and 8, metal shell 34 of adapter assembly
12 is a one-piece, stamped and formed sheet metal component. The
shell is generally U-shaped to include a top wall 34a and side
walls 34b for embracing the top and sides of inner housing 26 as
seen best in FIG. 3. The shell has a forwardly projecting,
cantilevered spring arm 34c which is provided with a downwardly or
inwardly turned hook portion 34d at the distal end thereof. The
spring arm is provided for spring loading latch 32, as described
hereinafter. A pair of stamped and formed resilient tabs 34e
project outwardly from side walls 34b of the metal shell and
project through openings 46 (FIG. 1) in the sides of outer housing
bracket 36 to mount the shell and inner housing therewithin. The
subassembly of inner housing 26, latch 32 and metal shell 30 are
inserted in the direction of arrow "A" into outer housing bracket
36, compressing resilient tabs 34d, until the tabs snap back
outwardly into openings 46 in the outer housing bracket to hold the
adapter assembly in assembled condition.
Referring to FIG. 9 in conjunction with FIGS. 1-6, latch 32
includes a pair of pivot trunions 48 (FIG. 9) which are captured in
inner housing 26 and mount the latch for pivotal movement relative
to the inner housing in the direction of double-headed arrow "B"
(FIG. 9). A stop boss 50 engages a
top wall 52 of the inner housing to define the completely latched
condition of the latch. The latch includes a downwardly or inwardly
projecting latch portion 32a (FIG. 6) which engages behind a
shoulder of cable connector 16 to prevent the connector from being
pulled out of adapter assembly 12. The latch has a groove 32b on
the top or outside thereof for receiving hook 34d of latch arm 34c
of metal shell 34. Therefore, the resilient metal latch arm is
effective to bias latch 32 toward its latched position in
engagement with cable connector 16.
FIGS. 2, 5, 6 and 9 best show the mounting and movement of shutter
members or doors 28 which close and open receptacle end 26a, as
well as the single shutter member or door 30 which closes and opens
receptacle end 26b. More particularly, each of doors 28 and 30 are
one piece structures unitarily molded of dielectric material such
as plastic or the like, although other materials are contemplated.
Each door includes a pivot rod portion 51 integral therewith. The
pivot rod portions of doors 28 are journalled in bores 51a (FIG. 9)
within inner housing 26, and the pivot rod portion of door 30 is
journalled in a bore 52 in the inner housing. In order to provide
for assembly of latch 32 and doors 28 and 30 within the inner
housing, the inner housing is fabricated in two parts joined at an
interface 54 (FIGS. 4 and 9). One part may have appropriate holes
56 (FIG. 9) for receiving pegs from the other part with a press-fit
to provide an interference or frictional securement between the
parts.
As best seen in FIGS. 2, 5 and 6, doors 28 are spring loaded by
torsion springs 58 and door 30 is spring loaded by a torsion spring
60 to bias the doors toward their closed positions as shown in
FIGS. 6 and 9. The doors 28 and 30 intersect any light beams and
prevent light energy from exiting the adapter when the doors are
closed. The doors also prevent dust from entering the adapter when
one or both of the connectors are removed. FIG. 5 shows door 30
forced open against the biasing of torsion spring 60 by the
insertion cable connector 16. FIG. 2 shows doors 28 forced open by
the insertion of board connector 14 against the biasing of torsion
springs 58.
The use of a pair of opposing doors 28, versus a single door, to
close one of the receptacle ends of the adapter assembly has a
number of advantages. First, the two doors save considerable axial
space which otherwise would be required to accommodate the full
pivoting action of a single door which would be twice as big as
each of the pair of doors. Second, it is easier to open the two
smaller doors because smaller springs can be provided. The
connector is biased by the doors to the center and, thereby, most
forces are applied near the edges of the doors, whereas with a
single door a large force is required on one side of the centerline
than the other side. Third, the torsion springs can extend all the
way to the closing edges of the two doors to provide more uniform
forces on the doors than is possible when the torsion spring
extends only to the center of the door as with the single door 30.
Extending the spring all the way to the edge of the larger door 30
would create less uniformity in the forces and require a larger
spring. Fourth, the wiping surface of either of the pair of doors
28 is one-half the wiping surface of the single door 30. With the
single door, dust collected on the outside of the door is carried
all the way toward the interface area between the connectors. With
the two doors 28, any dust which accumulates on the outer surfaces
thereof will be deposited primarily on the sides of the board
connector rather than being carried interiorly by the mating face
of the board connector. A single door 30 is used at receptacle end
26b because of the existence of latch 32 and the inability to
accommodate a double-door arrangement.
Referring to FIG. 10 in conjunction with FIGS. 1 and 2, board
connector 14 includes an outer housing 62 substantially surrounded
by a metal shield 64. The metal shield is removed in FIG. 1. The
outer housing includes a pair of downwardly projecting mounting
posts 66 for insertion into mounting holes 68 in circuit board 22
to mount the board connector to the circuit board. The outer
housing has a pair of upwardly projecting bosses 70 for
facilitating securing metal shield 64 thereto. The outer housing
has a pair of interior, forwardly projecting latch arms 72 (FIG. 1)
for latchingly engaging cable connector 16, as described
hereinafter.
Referring to FIG. 11 in conjunction with FIGS. 2 and 10, an inner
housing insert, generally designated 74, is inserted in the
direction of arrow "C" into a cavity 76 within outer housing 62.
The inner housing insert has a forwardly projecting cantilevered
latch arm 78 provided with a hook portion 78a for latching into a
hole 80 in the bottom of outer housing 62 to hold the housing
insert within the outer housing. In essence, inner housing insert
74 provides a ferrule holder for embracing and mounting a ferrule
82 which terminates the fibers of a fiber optic ribbon cable 84
(FIG. 10). Fiber ends 86 (FIG. 11) are exposed at a mating face 82a
of ferrule 82. The ferrule has a pair of alignment holes 88 for
receiving alignment pins from a ferrule of cable connector 16, as
described hereinafter. Referring to FIGS. 12-17 in conjunction with
FIG. 11, inner housing insert 74 is a two-part structure including
a top half 90 and a bottom half 92. The insert halves each may be
fabricated of molded dielectric plastic material. FIG. 12 shows
bottom insert half 92 including latch arm 78, along with a pair of
inwardly-turned side hooks 94 and a pair of assembly holes 96.
FIGS. 15-17 show that top insert half 90 includes side shoulders 98
within side recesses 99, along with a pair of assembly pegs 100.
The two halves 90 and 92 of insert housing 74 are assembled by
aligning hooks 94 of bottom half 92 with recesses 99 at the sides
of top half 90. Assembly pegs 100 at the bottom of the top half
also are aligned with assembly holes 96 in the top of the bottom
half. The two halves are moved toward each other until hooks 94 of
the bottom half snap into engagement with shoulders 98 of the top
half, whereupon the two halves are locked together in assembled
condition as shown in FIG. 11.
FIGS. 18-21 show cable connector 16 in assembled condition and
FIGS. 22-39 show various components of the cable connector.
Referring first to FIGS. 18-20, the cable connector includes an
inner housing 102 (FIGS. 22-25) which includes a pivotally mounted
rear cover 104 (FIGS. 26-28); a rear boot 106 (FIGS. 29-31) which
surrounds the rear end of the housing and cover; a pin holder 108
(FIGS. 33-35 which mount a pair of alignment pins; and a front pull
latch 110 (FIGS. 36-39) for latchingly engaging the cable connector
with board connector 14 within adapter assembly 12.
More particularly, referring to FIGS. 22-25 in conjunction with
FIGS. 18-21, inner housing 102 includes a forward mating end 102a
which mounts a ferrule which terminates the fibers of fiber optic
cable 24. A pair of alignment pins 114 extend through ferrule 112
and into alignment holes 88 in ferrule 82 (FIG. 11) of board
connector 14. The mating end 102a of the inner housing also has a
latch rib 102b on the outside thereof. The inner housing is
generally hollow and both the top and bottom walls thereof include
an elongated opening 102c and a cantilevered, flexible latch arm
102d. A bottom shelf 102e projects rearwardly of the inner housing
and a top pivot boss 102f also projects rearwardly of the housing.
The bottom shelf has a boot latch recess 116, and the top pivot
boss has a through pivot bore 118.
Referring to FIGS. 26-28 in conjunction with FIGS. 18-25, rear
cover 104 has a top wall 104a and a pair of depending side walls
104b. A boot latch recess 120 is formed in the outside of top wall
104, and a boot latch recess 122 is formed in the outside of each
side wall 104b. A pivot hole 124 is formed through the upper/inner
corners of side walls 104b. Rear cover 104 is pivotally mounted to
inner housing 102 by means of a pivot shaft 126 (FIG. 20) which
extends through pivot bore 118 in inner housing 102 and pivot holes
124 in rear cover 104. Therefore, the rear cover is pivotally
mounted on the inner housing for movement between an open condition
allowing assembly of fiber optic cable 24 within the housing and a
closed position clamping the cable within the housing and its rear
cover.
More particularly, as seen in FIG. 21, fiber optic cable 24 has an
enlarged crimp ring 126 captured within the rear of housing 102 and
cover 104. As is known in the art, most fiber optic cables have
strength members (fibrous) running the length of the cable. When
the cable is terminated, these strength members are folded
backwardly of the cable, as at 24a, to expose the fibers, and the
strength members are crimped by a crimp ring such as ring 26.
Therefore, the crimp ring is in direct engagement with the strength
members of the cable. With the invention, housing 102 and cover 104
are effective to capture the crimp ring and thereby transfer any
forces from the connector to the strength members of the cable.
FIGS. 29-31 show the rear boot 106 of cable connector 16. The boot
is a one-piece structure fabricated of somewhat flexible material
to provide a strain relief means at the rear of the cable. The rear
of the boot includes finger-gripping exterior ribs 106a to
facilitate gripping the cable connector and inserting the connector
into adapter assembly 12. The boot is generally hollow, with a
front cavity 106b which surrounds the area of the bottom shelf 102e
of the inner housing along with rear cover 104. As seen in FIGS. 31
and 32, cavity 106b is generally rectangular and includes an
inwardly projecting latch boss 106c-106d on the inside of each of
the four walls of the cavity. Latch boss 106c snaps within boot
latch recess 116 (FIGS. 23 and 25) at the bottom of shelf 102e of
inner housing 102. Latch boss 106d snaps into recess 120 (FIGS. 26
and 27) on the top of rear cover 104. Latch bosses 106e snap into
recesses 102 (FIG. 27) in the sides of the rear cover. Therefore,
the boot is securely locked to housing 102 and its rear cover 104
to provide a rear strain relief for cable connector 16. The boot is
threaded onto the cable before the cable is prepared and crimp ring
26 is applied. After the cable is assembled in the connector and
cover 104 is closed, the boot is moved forwardly to its latched
position.
FIGS. 33-35 show pin holder 108 in greater detail. As seen best in
FIG. 21, alignment pins 114 have rear head portions 114a. Pin
holder 108 has a pair of troughs 108a (FIG. 34) into which the rear
ends of the alignment pins are inserted in the direction of arrows
"D", i.e. transversely of the axes of the alignment pins. The pins
have reduced diameter portions 114b (FIG. 21) immediately forwardly
of rear head portions 114a. Troughs 108a of the pin holder lead to
passages shown best in FIG. 35 for capturing the inner head ends of
the alignment pins. Specifically, each passage includes an enlarged
portion 126 for receiving the head portion 114a and a narrower
portion 128 for receiving the reduced diameter 114b of the
alignment pin.
FIG. 21 shows that a pair of coil springs 130 are mounted within
inner housing 102 for biasing pin holder 108 forwardly of the cable
connector. The pin holder abuts the rear of ferrule 112, and
alignment pins 114 project through the ferrule. Therefore, the
ferrule, alignment pins and the terminated fibers within the
ferrule are spring loaded by coil springs 130, through pin holder
108. The two coil springs 130 are laterally spaced relative to a
longitudinal or insertion axis of the connector. The laterally
spaced springs provide a much more unified force distribution than
a single spring. A peripheral shoulder 130 (FIG. 21) engages a
complementary shoulder on the inside of the housing to define the
forward limit position of the pin holder, ferrule and related
components.
FIGS. 36-39 show pull latch 110 which surrounds inner housing 26 of
cable connector 16 for latchingly engaging the cable connector with
board connector 14. Specifically, the pull latch is hollow and
forms sort of a sleeve surrounding the housing. The pull latch has
shoulders 132 on the inside of the top and bottom thereof for
latchingly engaging latch arms 102d of the inner housing as best
seen in FIG. 20. A pair of coil springs 134 are disposed in
elongated openings 102c in the housing as best seen in FIGS. 22 and
23. These coil springs engage shoulders 136 (FIG. 20) on the inside
of the pull latch to bias the pull latch forwardly of the
connector. The pull latch has what can be considered a forward
locking nose portion 110a.
During mating of board connector 14 and cable connector 16, side
latch arms 72 (FIG. 1) within the board connector snap behind latch
ribs 102b (FIG. 22) of inner housing 102 of the cable connector.
During this mating movement, latch ribs 102b of the cable connector
bias latch arms 72 of the board connector transversely outwardly
whereupon the distal ends of latch arms 72 abut the front nose 110a
of pull latch 110. This causes the pull latch to be pushed
rearwardly against the biasing of coil springs 134 (FIG. 20). When
latch arms 72 pass latch ribs 102b, hooked ends 72a (FIG. 1) snap
back inwardly behind the latch ribs. This allows a clearance
between latch arms 72 and housing 62 of the board connector for
nose end 110a of the pull latch to be biased forwardly by coil
springs 134. This clearance is shown at 140 in FIG. 1. With the
nose of the pull latch now being biased into the clearance between
latch arms 72 and the inside of housing 62 of the board connector,
the latch arms are locked or blocked from becoming disengaged from
latch ribs 102b on the cable connector. When it is desired to
unmate the connectors, pull latch 110 is pulled rearwardly against
the biasing of coil springs 136 which, in turn, unblocks latch arms
72 of the board connector so that the latch arms can ride over
latch ribs 102b of the cable connector and, thereby, unmate the
connectors.
It will be understood that the invention may be embodied in other
specific forms without departing from the spirit or central
characteristics thereof. The present examples and embodiments,
therefore, are to be considered in all respects as illustrative and
not restrictive, and the invention is not to be limited to the
details given herein.
* * * * *